Java Scanner won't “finish” reading input

Question

I\'ve been having trouble using java\'s Scanner class. I can get it to read my input just fine, but the problem is when I want to output something. Given multiple lines of i

Answer 1

You are reading from an Infinite stream in this case. hasNextLine() will keep returning true if there is another line in the input of this scanner. As its a System.in, it will keep reading from the Keyboard, unless you terminate it or tell the stream to stop.

Press "ctrl+Z" in the end, you will see that it works.

Edit : You could do something like this...

Scanner scanner = new Scanner(System.in);   //scanner reads block of input
        int BLOCK_SIZE  =3,count=1;
        while(scanner.hasNextLine()){    
            //body of loop goes here
            String s = scanner.nextLine();
            Scanner ls = new Scanner(s);   //scanner to parse a line of input
            while(ls.hasNext()){
            //body of nested loop goes here
            ls.next();
            }
            if(count++==BLOCK_SIZE)
            {
                break;
            }
        }
        System.out.println("Fin");

    }